I'm not a fan of this government but where have they said "get jabbed or else"? The way I see it, they're more reluctant to bring in Covid passports than some other governments and would prefer to leave it up to individual businesses/venues to decide. If other countries insist we have to have one to holiday there then there's not much our government can do but to go along with it.
Also, where have they made holidays "illegal"? All they're doing is just advising that the situation in many other countries is such that booking anything for the near future wouldn't be a wise move. You can still take a punt though and book a holiday abroad if you want.
As for not having any freedom despite half the country being jabbed, we have a roadmap out of lockdown that was announced weeks ago and so far that timetable hasn't been altered, so unless something goes drastically wrong in the meantime you can go and get wankered in a pub beer garden in a little over 2 weeks time.